Mirror universe
Inhabitants of Vega IX.
Executed colonists []
These five thousand colonists were executed by the mirror universe's Captain James T. Kirk, his second action after assuming command of the ISS Enterprise from the assassinated Christopher Pike.
While stuck in the mirror universe briefly in 2267, the prime universe's James T. Kirk asked the ship's computer to read the official record of the starship's current command, and learned of the colonists' deaths. (TOS: "Mirror, Mirror")
These colonists were only mentioned in dialogue.
In contrast, prime universe James T. Kirk was a survivor of the massacre of 4,000 colonists by Kodos the Executioner.